Composed mostly of basalt formations, Qimei ranks the fifth largest island in the Penghu Archipelago.

In the shadow of a jutting basalt formation, we encountered melons growing in the desert, ripening on the vine with unimaginable speed.

Most likely in November of 1796, Alexander von Humboldt called the 24 million year old basalt formation the most beautiful he had encountered in Europe.

It is the largest basalt formation of Central Europe.

The basalt formations have been eroded by weathering and were much higher at one time.

Ancient volcanic activity in this area created many layered basalt formations, known as Deccan Traps.

Of particular note is the large, well-defined columnar basalt formation on the southwest side of Peter's Rock.

The basalt formations became larger, more massive, until they rose on every side, a mountain atop Sin'hai.

And if you're a rock climber, don't miss the columnar basalt formations along the butte's lower western side (at W 1st Ave).

So I've been trying to date the basalt formation by cross-comparison with known samples in our geological database.